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Plasma Generator DLZ-MA-300D of Plasma Ignition System

Plasma Generator DLZ-MA-300D of Plasma Ignition System

Plasma Generator is the core equipment of plasma ignition and combustion stabilization system. Plasma arc from generator DLZ-MA-300D is stabilized by two stages of swirl air. Its working principle is: after setting the value of the output current of the power supply system, the cathode 2 moves forward to contact with the anode 1, and the output current gradually increases to the set value and remains constant. Then, the cathode slowly leaves the anode, forming an arc between the cathode and anode. And then carrier medium passes through the arc, it is ionized into a plasma, and its jet is ejected from the anode outlet, forming a flame with a core temperature of about 5000K.


1.Anode  2.Cathode  3.Power Supply





1.Cathode conduit,2. Arc striking mechanism,3. Hood,4. Anode bearing assembly,5. Arc striking anode,6. Transition anode assembly,7. Main anode

 

Outline of generator DLZ-MA-300D


Anode bearing assembly:It is the platform of installation for other parts,like anode, cathode, arc striking mechanism. Besides, it can introduce and distribute the cooling water and medium air with corresponding connections on it, as shown in Figure 3.3 in detail. 
Arc striking anode: Its arc striking cone contacts with the cathode head, and then the cathode head moves backward to complete plasma arc striking and the generator’s start-up. After that, this anode acts as the arc channel to compress the arc for the first stage. 
Transition anode assembly: After the arc striking is completed and the voltage reaches the normal value, the transition anode acts as the arc channel, organizes the air flow to compress the arc for the second stage, and pushes forward the anode arc root to ensure it falls on the main anode.
Main anode: When the generator works, the arc root of the anode falls on the inner surface of main anode, and the plasma jet is ejected from its nozzle. The main anode will be damaged due to high temperature ablation during operation until it is burnt out. It needs to be checked and replaced regularly.
Cathode conduit: As shown in Figure3.7, the cathode gun is mainly composed of cathode head, body, cathode end set. During operation, the cathode head is damaged by high-temperature radiation heat and positive ion bombardment, and needs to be replaced regularly. The incoming and returning water connections on the cathode end set are respectively connected to the incoming and returning water joints on the anode support assembly to cool the cathode head. 
Arc striking mechanism: It includes a motor, a pulling rod and a hook. The pulling rod drives the cathode gun forward through the hook and contacts with the anode. After the arc striking current is established and stabilized, pull the cathode backward to complete the generator start-up. See Figure 3.8.

Parameters
Incoming water pressure: 0.6~1.0MPa
Water pressure difference between inlet and outlet: 0.4MPa~0.8MPa
Compressed air parameters
 
  First stage air Second stage air Working current
(A)
Working voltage
(V)
Power
(kW)
P1(MPa) P2(MPa)      
1 0.12 0.04~0.05 160~320 460~580 80~180
2 0.14 0.04~0.05 320~380 450~580 160~200